The human spinal column and upward ejection acceleration : an appraisal of biodynamic implications

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049 ‡aMAIN
086 0 ‡aD 301.45/32-3:66-233
100 1 ‡aHenzel, John H., ‡eauthor.
245 1 4 ‡aThe human spinal column and upward ejection acceleration : ‡ban appraisal of biodynamic implications / ‡cJohn H. Henzel.
264 1 ‡aWright-Patterson Air Force Base, Ohio : ‡bAerospace Medical Research Laboratories, Aerospace Medical Division, Air Force Systems Command, ‡c1967.
300 ‡aiii, 54 pages : ‡billustrations ; ‡c28 cm.
336 ‡atext ‡btxt ‡2rdacontent
337 ‡aunmediated ‡bn ‡2rdamedia
338 ‡avolume ‡bnc ‡2rdacarrier
490 0 ‡aAMRL-TR ; ‡v66-233
500 ‡aThe critical review of the literature which forms the basis of this report was conducted under Project 7231, "Biomechanics of Aerospace Operations," Task 723101, "Effects of Vibration and Impact."
504 ‡aIncludes bibliographic references (pages 51-54).
520 ‡a"Vertebral compression represents a significant percentage of the morbidity associated with upward ejection. Vertebral and intervertebral structure reacts to and is sometimes irreversibly altered by ejection acceleration. Design and material properties of the normal vertebral column are sufficiently constant that when structural characteristics are defined and acceleration profiles known, prediction of failure may be made. Compressive load analyses of vertebra-disc complexes demonstrated that the vertebral end-plates are the initially failing structures of the spinal column. From experimental data on vertebral breaking-loads, acceptably accurate probability-of-injury curves for static loading were generated. These data together with data describing the dynamic response characteristics of the human body permit calculation of the probability-of-injury for dynamic loading produced by exposure to impact accelerations. As an aid to the designer of ejection systems, application of these concepts should refine the estimate of "safe" acceleration profiles and minimize the risk of irreversible vertebral deformation."--Abstract.
538 ‡aMode of access: Internet.
541 1 ‡cGift of ‡aRobert B. Sleight, ‡d1979. ‡5ViFGM
650 7 ‡aSpine ‡xWounds and injuries. ‡2fast ‡0(OCoLC)fst01129951
650 7 ‡aEscape physiology (Space flight) ‡2fast ‡0(OCoLC)fst00915126
650 7 ‡aAcceleration (Physiology) ‡2fast ‡0(OCoLC)fst00795218
650 0 ‡aSpine ‡xWounds and injuries.
650 0 ‡aAcceleration (Physiology)
650 0 ‡aEscape physiology (Space flight)
655 7 ‡aTechnical reports. ‡2fast ‡0(OCoLC)fst01941336
655 7 ‡aTechnical reports. ‡2lcgft
710 2 ‡aAerospace Medical Research Laboratories (U.S.), ‡esponsor.
710 2 ‡aHuman Factors and Ergonomics Collection. ‡5ViFGM
730 0 ‡aTechnical Report Archive & Image Library (TRAIL)
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